Project number:
1987-075
Project Status:
Completed
Budget expenditure:
$0.00
Principal Investigator:
Keith Sainsbury
Organisation:
CSIRO Oceans and Atmosphere Cleveland
Project start/end date:
28 Dec 1989
-
31 Dec 1989
Contact:
FRDC
1. Observe, in situ, fish behaviour to various fish trap designs using underwater cameras.
2. Compare performance of fish trap designs. Improve design of fish traps & techniques for trapping fish on the NW Shelf of WA
Final report
Author:
Keith Sainsbury
Final Report
•
3.63 MB
1987-075-DLD.pdf
1 A method was developed to rapidly assess the effectiveness of trap designs and identify
the causes of differences in effectiveness.
2 Fish entry and escape probabilities are correlated across trap designs. The probabilities
are very high for '0' and 'S' trap designs and are much lower for the 'Z' design. Traps
with high entry and escape probabilities are best for a fishing strategy based on short
soak times, while traps with low probabilities are best for strategies using long set
times. 'Z' traps provide a greater catch per set than 'S' traps for soaks longer than about
4 h, while 'S' traps provide better catches for soaks shorter than about 4 h.
the causes of differences in effectiveness.
2 Fish entry and escape probabilities are correlated across trap designs. The probabilities
are very high for '0' and 'S' trap designs and are much lower for the 'Z' design. Traps
with high entry and escape probabilities are best for a fishing strategy based on short
soak times, while traps with low probabilities are best for strategies using long set
times. 'Z' traps provide a greater catch per set than 'S' traps for soaks longer than about
4 h, while 'S' traps provide better catches for soaks shorter than about 4 h.
